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a536e5d699
Replace traditional `#ifndef`/`#define`/`#endif` include guards with
`#pragma` once.
`#pragma once` is a widely supported preprocessor directive that
prevents header files from being included multiple times. It is
supported by all toolchains used to build edk2: GCC, Clang/LLVM, and
MSVC.
Note: Headers taken directly from external projects, such as those
in OvmfPkg/Include/IndustryStandard/Xen/ were not modified since they
may be periodically re-synced and do not follow other edk2 coding
stadards.
Compared to macro-based include guards, `#pragma once`:
- Eliminates the risk of macro name collisions or copy/paste errors
where two headers inadvertently use the same guard macro.
- Eliminate inconsistency in the way include guard macros are named
(e.g., some files use `__FILE_H__`, others use `FILE_H_`, etc.).
- Reduces boilerplate (three lines replaced by one).
- Avoids polluting the macro namespace with guard symbols.
- Can improve build times as the preprocessor can skip re-opening the
file entirely, rather than re-reading it to find the matching
`#endif` ("multiple-include optimization").
- Note that some compilers may already optimize traditional include
guards, by recognzining the idiomatic pattern.
This change is made acknowledging that overall portability of the
code will technically be reduced, as `#pragma once` is not part of the
C/C++ standards.
However, this is considered acceptable given:
1. edk2 already defines a subset of supported compilers in
BaseTools/Conf/tools_def.template, all of which have supported
`#pragma once` for over two decades.
2. There have been concerns raised to the project about inconsistent
include guard naming and potential macro collisions.
Approximate compiler support dates:
- MSVC: Supported since Visual C++ 4.2 (1996)
- GCC: Supported since 3.4 (2004)
(http://gnu.ist.utl.pt/software/gcc/gcc-3.4/changes.html)
- Clang (LLVM based): Since initial release in 2007
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/** @file
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Defines the defitions used by TDX in OvmfPkg.
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Copyright (c) 2020 - 2021, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#pragma once
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#include <PiPei.h>
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#include <Library/BaseLib.h>
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#include <Uefi/UefiSpec.h>
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#include <Uefi/UefiBaseType.h>
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#define MP_CPU_PROTECTED_MODE_MAILBOX_APICID_INVALID 0xFFFFFFFF
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#define MP_CPU_PROTECTED_MODE_MAILBOX_APICID_BROADCAST 0xFFFFFFFE
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//
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// This enum is defined for the use of Intel TDX Guest.
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// TDX Guest CPUs wait for below commands and do corresponding tasks.
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//
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typedef enum {
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MpProtectedModeWakeupCommandNoop = 0,
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MpProtectedModeWakeupCommandWakeup = 1,
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MpProtectedModeWakeupCommandAcceptPages = 2,
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} MP_CPU_PROTECTED_MODE_WAKEUP_CMD;
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#pragma pack(1)
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//
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// Describes the CPU MAILBOX control structure use to
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// wakeup cpus spinning in long mode
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//
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typedef struct {
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UINT16 Command;
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UINT16 Resv;
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UINT32 ApicId;
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UINT64 WakeUpVector;
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UINT8 ResvForOs[2032];
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//
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// Arguments available for wakeup code
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//
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UINT64 WakeUpArgs1;
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UINT64 WakeUpArgs2;
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UINT64 WakeUpArgs3;
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UINT64 WakeUpArgs4;
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UINT8 Pad1[0xe0];
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UINT64 NumCpusArriving;
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UINT8 Pad2[0xf8];
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UINT64 NumCpusExiting;
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UINT32 Tallies[256];
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UINT8 Errors[256];
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UINT8 Pad3[0xf8];
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} MP_WAKEUP_MAILBOX;
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//
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// AP relocation code information including code address and size,
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// this structure will be shared be C code and assembly code.
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// It is natural aligned by design.
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//
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typedef struct {
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UINT8 *RelocateApLoopFuncAddress;
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UINTN RelocateApLoopFuncSize;
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UINT8 *RelocateApResetVector;
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} MP_RELOCATION_MAP;
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#pragma pack()
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